How to read micrometer

Composition Micrometer

A micrometer is a sliding scale precision measuring instrument that can measure workpiece dimensions in terms of length, width, difference and depth. It is often used in the machine tool industry and the automotive industry, etc. The working principle of the micrometer is based on the movement of the screw with the integral mouthpiece, measuring sleeve, scale rod and sliding impact rotary head, which is durable, small in size, compact in use. It is easy to operate. It can measure objects with a size of 0.01 mm. This makes it possible to measure and read the value in detail and with high accuracy. Today, micrometers are available as external micrometers, micrometers, depth measurements. Each type of micrometer has its characteristics and methods of use. own Different operating and maintenance characteristics Therefore, users must study the principle of use correctly and suitable for the workpiece to be measured before use.

STEP 1 Check the micrometer before use.

Using a micrometer for accurate measurement results The user must select a micrometer that is suitable for the type of workpiece. Check the operating conditions of the micrometer. And clean the workpiece before measuring according to the correct steps, namely, rotate the measuring sleeve so that the measuring axis of the micrometer expands wider than the workpiece size, and then the axis touches the workpiece surface. The measuring line must be perpendicular to the work surface and then rotate the measuring sleeve to make the measuring axis close to the object about 1-2 mm. Move until the measuring axis touches the workpiece, then the measurement value can be read.

STEP 2 Look at the main scale.

The top row represents all millimeter gradients. The circumference of the thimble is divided into 50 equal divisions: 1 mm.

the bottom row means 0.5 mm, each rotation of the thimble will result in ½ mm (0.5 mm) of the spindle.

STEP 3 Method of reading Micrometer

Micrometer, resolution 0.01 mm.

(1) Sleeve Scale 7 mm.

(2) Thimble Scale 0.37 mm.

Read micrometer 7.37 mm.

Read the measurement result at the master scale (Sleeve scale) By observing where the edge of the thimble scale corresponds to the range of the main scale. From the figure, it can be seen that the edge The dial scale corresponds to the main scale. In the range 7 mm to 8 mm, readings at 7.00 mm on the main scale are readable.

Read the measurement result on the rotary scale (Thimble scale) See the position of the rotating scale to see if the scale corresponds to the center line of the main scale. From the figure, it can be seen that the 37th rotation scale corresponds to the center of the main scale exactly. can read the value of the rotary scale By multiplying the resolution value of the instrument, the readable rotary scale line is 37 x scale, 0.01 mm resolution equals 0.37 mm. The rotary scale is 7.00 mm. 0.37 mm is equal to 7.37 mm.